Designation
An RNAV specification is designated as RNAV X, e.g. RNAV 1. The expression 'X' (where stated) refers to the lateral navigation accuracy in nautical miles, which is expected to be achieved at least 95% of the flight time by the population of aircraft operating within the airspace, route or procedure.
There are no RNAV approach specifications.
Read more about this topic: Area Navigation
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